Potentially chemotherapeutic purine analogues. Part V. Some hydrazone derivatives of pyrazole-4,5-diones and their cyclisation to pyrazolo-[3,4-e][1,2,4]triazines
作者:J. H. Lister、D. S. Manners、G. M. Timmis
DOI:10.1039/j39700001313
日期:——
4-Thiosemicarbazones of pyrazole-4,5-diones are prepared by the reaction of thiosemicarbazide with the diones themselves or with 4-p-diethylaminophenylimino-, 4-hydroxyimino-, or 4,4-dibromo-pyrazol-5-one. Cyclisation of 4-thiosemicarbazonopyrazol-5-ones under alkaline conditions leads to pyrazolo [3,4-e][1,2,4]triazine-3-thiols. The latter and their derivatives are of interest as potentially chemotherapeutic purine
通过使硫代氨基脲与二酮本身或与4-对-二乙基氨基苯基亚氨基-,4-羟基亚氨基-或4,4-二溴-吡唑-5-酮反应来制备吡唑-4,5-二酮的4-硫代氨基甲唑酮。在碱性条件下将4-thiosemicarbazonopyrazol-5-one环化可生成吡唑并[3,4- e ] [1,2,4]三嗪-3-硫醇。后者及其衍生物作为潜在的嘌呤类似物是令人感兴趣的。